import axios from 'axios'
import Vue from 'vue'
import {Notification, MessageBox, Message, Loading} from 'element-ui'

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'

// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: process.env.VUE_APP_BASE_API,
  // 超时
  timeout: 10000
})

// request拦截器
service.interceptors.request.use(config => {
  // get请求映射params参数
  config.params = {...config.params || {}}
  let url = config.url + '?'
  for (const propName of Object.keys(config.params)) {
    const value = config.params[propName]
    var part = encodeURIComponent(propName) + '='
    if (value !== '' && value !== null && typeof (value) !== 'undefined') {
      if (typeof value === 'object') {
        for (const key of Object.keys(value)) {
          let params = propName + '[' + key + ']'
          var subPart = encodeURIComponent(params) + '='
          url += subPart + encodeURIComponent(value[key]) + '&'
        }
      } else {
        url += part + encodeURIComponent(value) + '&'
      }
    }
  }
  url = url.slice(0, -1)
  config.params = {}
  config.url = url
  return config
}, error => {
  console.log(error)
  Promise.reject(error)
})

// 响应拦截器
service.interceptors.response.use(res => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || 200
    // 获取错误信息
    const msg = res.data.msg || '请求错误'
    if (code === 401) {
      MessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
          confirmButtonText: '重新登录',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).then(() => {
        // store.dispatch('LogOut').then(() => {
        //   location.href = '/index'
        // })
      })
    } else if (code === 500) {
      Message({
        message: msg,
        type: 'error'
      })
      return Promise.reject(new Error(msg))
    } else if (code !== 200) {
      Notification.error({
        title: msg
      })
      return Promise.reject('error')
    } else {
      return res.data
    }
  },
  error => {
    console.log('err' + error)
    let {message} = error
    if (message === 'Network Error') {
      message = '后端接口连接异常'
    } else if (message.includes('timeout')) {
      message = '系统接口请求超时'
    } else if (message.includes('Request failed with status code')) {
      message = '系统接口' + message.substr(message.length - 3) + '异常'
    }
    Message({
      message: message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)

export default (options, {loading = false, message = '加载中'} = {}) => {
  let loadingInstance
  if (loading) {
    loadingInstance = Loading.service({text: message})
  }
  return new Promise((resolve, reject) => {
    service(options).then(resolve).catch(reject).finally(() => {
      if (loading) {
        loadingInstance.close()
      }
    })
  })
}
